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/* Convert file size to number of blocks on System V-like machines.
Copyright (C) 1990 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Brian L. Matthews, blm@6sceng.UUCP. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if !defined (HAVE_ST_BLOCKS) && !defined(_POSIX_VERSION)
# include <sys/types.h>
# include <sys/param.h>
# ifndef NINDIR
/* Some SysV's, like Irix, seem to lack these. Hope they're correct. */
/* Size of a indirect block, in bytes. */
# ifndef BSIZE
# define BSIZE 1024
# endif
/* Number of inode pointers per indirect block. */
# define NINDIR (BSIZE/sizeof(daddr_t))
# endif /* !NINDIR */
/* Number of direct block addresses in an inode. */
# define NDIR 10
/* Return the number of 512-byte blocks in a file of SIZE bytes. */
long
st_blocks (size)
long size;
{
long datablks = (size + 512 - 1) / 512;
long indrblks = 0;
if (datablks > NDIR)
{
indrblks = (datablks - NDIR - 1) / NINDIR + 1;
if (datablks > NDIR + NINDIR)
{
indrblks += (datablks - NDIR - NINDIR - 1) / (NINDIR * NINDIR) + 1;
if (datablks > NDIR + NINDIR + NINDIR * NINDIR)
indrblks++;
}
}
return datablks + indrblks;
}
#else
/* This declaration is solely to ensure that after preprocessing
this file is never empty. */
extern int textutils_fileblocks_unused;
#endif
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